small refactor*

server/pkg/go-nfs/nfs_onreadlink.go

@@ -0,0 +1,55 @@
+package nfs
+
+import (
+	"bytes"
+	"context"
+	"errors"
+	"os"
+
+	"github.com/willscott/go-nfs-client/nfs/xdr"
+)
+
+func onReadLink(ctx context.Context, w *response, userHandle Handler) error {
+	w.errorFmt = opAttrErrorFormatter
+	handle, err := xdr.ReadOpaque(w.req.Body)
+	if err != nil {
+		return &NFSStatusError{NFSStatusInval, err}
+	}
+	fs, path, err := userHandle.FromHandle(ctx, handle)
+	if err != nil {
+		return &NFSStatusError{NFSStatusStale, err}
+	}
+
+	out, err := fs.Readlink(ctx, fs.Join(path...))
+	if err != nil {
+		if info, err := fs.Stat(ctx, fs.Join(path...)); err == nil {
+			if info.Mode()&os.ModeSymlink == 0 {
+				return &NFSStatusError{NFSStatusInval, err}
+			}
+		}
+		if os.IsNotExist(err) {
+			return &NFSStatusError{NFSStatusNoEnt, err}
+		}
+		if errors.Is(err, context.DeadlineExceeded) {
+			return &NFSStatusError{timeoutStatus, err}
+		}
+
+		return &NFSStatusError{NFSStatusAccess, err}
+	}
+
+	writer := bytes.NewBuffer([]byte{})
+	if err := xdr.Write(writer, uint32(NFSStatusOk)); err != nil {
+		return &NFSStatusError{NFSStatusServerFault, err}
+	}
+	if err := WritePostOpAttrs(writer, tryStat(ctx, fs, path)); err != nil {
+		return &NFSStatusError{NFSStatusServerFault, err}
+	}
+
+	if err := xdr.Write(writer, out); err != nil {
+		return &NFSStatusError{NFSStatusServerFault, err}
+	}
+	if err := w.Write(writer.Bytes()); err != nil {
+		return &NFSStatusError{NFSStatusServerFault, err}
+	}
+	return nil
+}